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Backdraft Damper This handy item is a backdraft damper with a spring return which prevents air and light from entering when a vent fan is not in use. Can be connected to ducting. Easy to install. Product ID: XDAMPER Category: Miscellaneous Equipment-Fans-Vent Fans-Accessories Choose Size 4" diameter $17.56 6" diameter $23.16 8" diameter $27.16 10" diameter $36.76 12" diameter $48.76 14" diameter $59.16 Quantity

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